Internal-combustion engine



Feb. 19, 1946. I c. N. ARON SON INTERNAL-COMBUSTION ENGINE- Filed Sept.'1, 1944 Patented Feb, 19, 1946 UNITED STATES PATENT OFFICE v 2,394,970I I INTERNAL-COMBUSTION ENGINE- I Charles N. Aronson, Niagara Falls, N.Y. Application September 1, 1944, Serial No. 552,349

2 Claims.

This inventionrelates to new and useful improvements in internalcombustion engines of the two-cycle type wherein a rotary valve isgenerally employed to introduce the combustible charge into thecrankcase on the up-stroke of the piston and where the charge issubsequently compressed on the down-stroke. In the conventional engineof this type, it has been customaryto cut slots in the regular size mainbearing journals and due to the small normal size of these journals, theslots had to be quite small.

It is the principal object of the present invention to provide an engineof the two-cycle type wherein the fuel charge is compressed within thecrankcase with enlarged bearing journals formed with fuel admissionslots and wherein the large journals are formed to a running bearing fitin the crankcase" itself.

Another important object of the invention is to provide journals of thecharacter stated which :because of their size have a flywheel efiect,thus eliminating the need for a flywheel and because of the presence ofthese large journals between the cylinders with their flywheel effect,the engine has a tendency to run much smoother than otherwise.

Still another important object of the invention is to provide journalsof the character stated especially for two-cycle engines which becauseof their size will be far easier to grind than those present in mostconventional types of engine.

Still a further object of the invention is to construct a motor withjournals of the character stated Which will have an overall simplicitywhich will permit its manufacture at a much lower cost than engines ofthis type.

Various other important objects and advantages of the invention shallbecome apparent to the reader of the following description.

In the drawing Figure 1 represents a fragmentary vertical vsectionalview through a two-cycle engine showing the journals as improved. Figure2 is a vertical sectional view (fragmentary) taken on the line 2-2 ofFigure 1.

Figure 3 is a top plan view of the improved crankshaft.

Referring to the drawing wherein like numerals desigate like parts, itcan be seen in Figure v1 that numeral 5 denotes a crankcase from whichrise cylinders 6.

The crankcase is formed to directly contact the journals of the improvedcrankshaft generally referred to by numeral 1.

As shown in Figure 3, the shaft I includes end journals 8, 9 which arenot slotted for the admis- Spaced between the journals 8, 9'

sion of fuel. are three large journals III, II and I2. Assuming thatthis crankshaft is to take care of a fourcylinder engine, it can be seenthat the journal I 0 is slotted at l3 to open through one side thereofto accommodate one'end cylinder. This same journal [0 is slotted as at Mto open at its opposite side to take care. of a cylinder next to saidend cylinder.

The journal II is unslotted, but the journal 12 is slotted in the samemanner as the journal l0,

. the same having a. slot l5 opening through one 'side to accommodatethe other end cylinder and a slot I 6 opening through the opposite sideof the same to accommodate the cylinder next to the last-mentioned endcylinder.

Thus it can be seen, that at each side of the slotted journals l0, l2,there is an unslotted journa1,- these unslotted journals being denotedby numerals 8, H and 9.

As can be seen in Figure 2, the side of the crankcase 5 has a manifoldll communicating with channels l8 opposed to the journals I2 and I0.Thus it can be seen, that'for the period of the up-stroke of a piston,fuel is being taken in to the crankcase, below its piston by way of themanifold ll, channel I8 and slot in the journal. Of course, on thedown-stroke this charge is compressed. A

While the foregoing specification sets forth the invention in specificterms, it is to be understood that numerous changes in the shape, sizeand materials may be resorted to without departing from the spirit andscope of the invention as claimed hereinafter.

.Having described the invention, what is claimed as new is:

1. In an engine of the character stated comprising a crankcase, aplurality of cylinders, a crankshaft, said crankshaft being providedwith alternately slotted and unslotted enlarged journals, the ends ofthe crankshaft being provided with unslotted journals, each slottedjournal being formed with two slots opening through op- !posite sides ofthe journal, and means for supplying fuel to the crankcase compartmentsdefined by the journals by way of said slots for compression by pistonsin the cylinders."

2. Ina two-cycle engine, a crankcase, a crank shaft, said crank shaftbeing provided with an enlarged cylindrical journal fitted rotatably buttight in a circular opening in a part of the crank case constituting awall of a fuel supply compartment for a working cylinder of the engine,

said crank case having a fuel charge admission channel the open side ofwhich is communicable throughout a substantial distance" annularly ofthe crank shaft journal, said fuel charge admission channel beinggenerally covered in closing relation by said crank shaft journal, saidcrank shaft journal being formed with a transverse peripheral fuelconducting. slot which is closed at one end and open at its other end atone side of the Journal and communicable with the adjacent fuel supplycompartment during a part of 5 the rotation of said journal.

CHARLES N. ARONSON.

